Example usage for com.amazonaws.services.ec2.model DescribeTagsRequest withFilters

Introduction

In this page you can find the example usage for com.amazonaws.services.ec2.model DescribeTagsRequest withFilters.

Prototype

public DescribeTagsRequest withFilters(java.util.Collection<Filter> filters) 

Source Link

Document

The filters.

Usage

From source file:org.cloudifysource.esc.driver.provisioning.privateEc2.PrivateEC2CloudifyDriver.java

License:Open Source License

private String createNewName(final TagResourceType resourceType, final String prefix)
        throws CloudProvisioningException {
    String newName = null;/*from w ww .  java 2  s  . c  om*/
    int attempts = 0;
    boolean foundFreeName = false;

    while (attempts < MAX_SERVERS_LIMIT) {
        // counter = (counter + 1) % MAX_SERVERS_LIMIT;
        ++attempts;

        switch (resourceType) {
        case INSTANCE:
            newName = prefix + counter.incrementAndGet();
            break;
        case VOLUME:
            newName = prefix + volumeCounter.incrementAndGet();
            break;
        default:
            // not possible
            throw new CloudProvisioningException("ResourceType not supported");
        }

        // verifying this server name is not already used
        final DescribeTagsRequest tagRequest = new DescribeTagsRequest();
        tagRequest.withFilters(new Filter("resource-type", Arrays.asList(resourceType.getValue())));
        tagRequest.withFilters(new Filter("value", Arrays.asList(newName)));
        final DescribeTagsResult describeTags = ec2.describeTags(tagRequest);
        final List<TagDescription> tags = describeTags.getTags();
        if (tags == null || tags.isEmpty()) {
            foundFreeName = true;
            break;
        }
    }

    if (!foundFreeName) {
        throw new CloudProvisioningException(
                "Number of servers has exceeded allowed server limit (" + MAX_SERVERS_LIMIT + ")");
    }
    return newName;
}

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